Timing change

Timing change

The timing gear plays a key role in each piston engine as it controls the opening and closing of the valves, letting in a mix of air and fuel and letting out exhaust gases. The timing gear is driven by a belt, rarely by a chain. If the belt breaks, the valves and pistons may collide, causing a costly damage. Therefore, the timing gear components, i.e. the belt or chain, tensioning rollers and guide rollers should regularly be changed and checked for any signs of wear.

Tips icon


  • The timing belt replacement schedule must be strictly followed
  • After buying a used car always have the timing gear changed
  • When changing the timing gear remember to have all of its accessories replaced, too
  • Oil leaks around the timing gear may cause the timing belt to wear faster
Range of services icon

Range of services

  • Removing the timing gear housing
  • Removing the tensioning rollers adjusting screw
  • Removing the tensioning roller and the guide roller
  • Fitting new rollers
  • Proper positioning of the crankshaft and the camshaft
  • Fitting a new timing belt
  • Tightening the tensioning rollers adjusting screw
  • Replacement of the water pump, if also powered by the timing belt

Car workshops: Timing change

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